User`s manual
7800 Series Hysteresisgraph System User's Manual
4-26 Operation
4.3.3 New Coil Setup File Method
To create a new 7800 setup file for an existing coil probe, first select an existing setup file from the hard disk,
which is similar to what you want. This file will be copied and modified to serve as a means to measure the
sensitivity of the new coil. The measurement process involves performing a Type 2 (Air Flux) calibration on the
new coil. Once measured, those new coil parameters will be placed into new setup file. The new coil setup file
will then be available for ‘AutoCalibrate’ mode on the 7800.
4.3.3.1 Create New Setup File
1. Pull up an existing, similar setup file.
a. Go to Main Menu <FILE>, <OPEN SETUP>, choose a .SET file.
2. Set Type 2 Calibration Mode.
a. Go to Main Menu <SETUP>, <SYSTEM SETUP>.
b. From the ‘Calibration Mode’ section, choose ‘Mode 2 , Air Flux.’
c. Press Accept.
3. Set Calibration field
a. Go to Main Menu <SETUP>, <CALIBRATION SETUP>.
b. From the ‘Air Flux Calibration’ section, enter <10,000> for the ‘Calibration Applied Field,H.’
c. Press Accept.
4. Setup Coil Parameters.
a. Go to Main Menu <SENSING>, <B, H COILS>.
b. For the B Coil, enter:
(1) Coil Input Terminal: 100 kΩ
(2) Number of Turns: Actual number of physical turns for each coil
(3) Avg. Area Per Turn: 1
(4) Area Turns: 1
(5) Coil Resistance: Actual Measured Coil Resistance
c. Do the same for the H Coil.
5. Save the Setup Coil.
a. Go to Main Menu <FILE>, <SAVE SETUP>,
b. Choose a new name and save the .SET file.
6. Connect the coils in question to the B and H coil inputs. Use the adapter cable, if necessary.
a. The H coil should be directly connected to the H coil input (no dividers).
b. Similarly, connect the B coil to the B coil input.
7. Put both 480 Fluxmeters into Automatic Drift Adjust mode.
a. On both 480 Fluxmeters, Press <Drift Adjust>, <Enter>, <Enter>
4.3.3.2 Run Type 2 Calibration
This determines the coil area-turns.
1. Press AutoCalibrate.
2. Load the new setup file.
3. Perform the Gaussmeter Calibration. Ensure the Gaussmeter probe is located in the center of the
polefaces and parallel to the faces of the Poletips.
4. Perform the H Calibration process.
5. At the end of the process, H and B coil sensitivities (AREA-TURNS) will be displayed on fluxmeter.
a. Press <#4 Coil Setup> followed by <ENTER> four times.
b. This will display the Area-Turns just determined for the B and H coils.